Travel in Concord / Henry David Thoreau
Passenger pigeon / John James Audubon
My first summer in the Sierra / John Muir
Travels in Florida / William Bartram
The canyon / John W. Powell
Buffalo country / George Catlin
The range of light / John Muir
Raggylug : the story of a cottontail rabbit / Ernest Thompson Seton
Birch browsings / John Burroughs
The land of little rain / Mary Austin
The bird and the machine / Loren Eiseley
The endless migrations / Roger Caras
On the edge of the abyss / Jack Rudloe
The twilight seas / Sally Carrighar
The mysterious lands / Ann Haymond Zwinger
Summer's end / Rachel L. Carson
Night of the great beach / Henry Beston
Johnny Bear / Ernest Thompson Seton
Brown bear summer / Thomas Bledsoe
The predators / Richard Ellis
The serpents of paradise / Edward Abbey
The misnamed, mistreated, and misunderstood Irish elk / Stephen J. Gould
Chicago spiders / Charles D. Stewart
Antarctic penguins / G. Murray Levick
The Atlantic salmon / Lee Wulff
The great chain of life / Joseph Wood Krutch.